A set of nonredundant (1oo1) safety equipment is used to construct an element used in a SIF.
Question:
A set of nonredundant (1oo1) safety equipment is used to construct an element used in a SIF. Demands are expected every minute. Automatic diagnostic time is given as 30 seconds.
What is the HFT? What is the operational demand mode? What SIL level is achieved by this design based on the IEC 61511:2016 architecture constraint table?
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Answer The HFT of a 1oo1 is 0 DI 1 minute ...View the full answer
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Related Book For 
Safety Instrumented System Design Techniques And Design Verification
ISBN: 9781945541438
1st Edition
Authors: Iwan Van Beurden, William Goble
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